Refrigerating apparatus



July 1-, 3936. F. w. ANDREWS REFRIGERATI [NG APPARATUS Filed Feb. 28, 1927 Patented July 1, 1930 UNITED STATES PATENT OFFICE FRANK W. ANDREWS, OF DAYTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

rRIGInAmE conrom 'rrori, A CORPORATION or DELAWARE REERIGERATINYG APPARATUS Application filed February 28, 1927. Serial No. 171,485.

preferred form of embodiment of the present invention is clearly shown.

- Referring to the drawings,

Fig. 1 is a perspective view of a condenser embodying the invention.

Fig. 2 is an enlarged section of a portion of the condenser, taken on the line 22 of Fig. 1.

Fi 3 is an end view. of a slightly modified orm of condenser and Fig. 4-is a plan view of a portion of a.

refrigerating machine, showing the condenser coils.

Referring to Fi 4, a compressor 10, driven by any'suita le source of power, not shown, is mounted on a base 11 and draws gaseous refrigerant from an evaporator, not shown, thru a suction conduit 12 and discharges it under .pressure to a connection 13 whence it passes to condenser coils 14.

These may be for convenience, placed on either side of the compressor. Liquefied refrigerant flows from the condenser coils at 15 to a suitable evaporator, not shown.

A fan 16 is provided for blowing air thru the condenser-to cool the latter. This may be mounted on the compressor shaft 17. The fan moves air in the direction of the arrows in Fig. 4, and the coils are placed with their convolutions lying substantially in planes parallel to the direction of the air currents.

The condensers are formed by winding a continuous strip of metal tubing 20 into a helical coil on a suitable form. The tubing may be either flat, as in Fi s. 1 and 2, or round as shown in Fig. 3. t has been found that when such a coil is removed from the form, the convolutions unwind somewhat, due to the elasticity of the tubing. To prevent such unwinding, the convolutions are held in place by clamping members 21 and 22, arranged in pairs and held together by bolts 23. Preferably three pairs of such clamps are arranged on the coils as shown in Figs. 1 and 4.

In order to hold the convolutions suitably spaced along the clamps, I place between the coil and one of each of the pairs of clamps a serpentine strip of sheet metal. 24. The individual convolutions are clamped firmly in the depressions 25 and are held in close thermal contact with the strip 24 by the bolts 28. The strip 24 is preferably made of some good thermal conduotor, such as copper, and due to the elevated portions 26, forms fins forthe transfer of heat from the tubing to the aircurrents.

The fins are placed with their flat sides parallel to the direction of the air currents in order to leave unobstructed passage for air between the clamps along the convolutions.

Preferably the portions 26 are spaced between the clamps 21 and 22 as shown in Fig. 2, to provide. air passages 27 and 28 on either side. This arrangement exposes the maximum surface to the air currents.

In order to support the coil on the machine base 11 or in other positions, I bend the ends of-the clamping members 21 at right angles to form the supports 29, which may be provided with bolt holes 30. The coil may be placed vertically as in Fig. 4, or in any other position such as horizontally, as in Figs. 1 and 3.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. Means for sup orting condenser coils comprising a pair 0 clamping members between which the coil is adapted to be held,

and a thermally conducting member between the clamping members, said conducting member having recesses for holding the convolutions of a coil in place.

2. In a support for condenser coils comprising a pair of means between which a coil is adapted to be clamped, a sheet metal strip adapted to be clamped between one of said means and a coil and having undulations for spacing the convolutions of a coil.

3. A condenser adapted to be cooled by air currents comprising in combinationa coil of tubing, a pair of clamping means for securing the convolutions of the coil in place, and spacing means between the clamping means and between said convolutions, said spacing means permitting unobstructed passage of air along the convolutions between the clamping means.

4. A condenser adapted to be cooled by air currents comprising in combination a coil of tubing a pair of clamping means for securing the convolutions of the coil in place, and spacing means between the convolutions comprising heat conducting means in ther-. mal contact with the coil.

5. A condenser adapted to be cooled by air currents comprising in combination a coil of tubing, a pair of clamping means for securing the convolutions of the coil in place and spacing means between the convolutions comprising heat conducting fins in thermal contact with the coil, said fins'being ar ranged to provide unobstructed air passages between the clamping means along the convolutions.

6. Refrigerating apparatus comprising in combination, means for moving air, means for condensing refrigerant including a coil of tubing having its convolutions substantially parallel to the direction of motion of the air, clamping means for supporting the convolutions of the coil, and spacing means for the convolutions comprising heat conducting fins disposed parallel to the direction of motion of the air.

7. Refrigerating apparatus comprising in combination, means for moving air, means for condensing refrigerant including a coil of tubing havingits convolutions substantially parallel to the direction of motion of the air a pair of clamping means for supporting the convolutions of the coil, and.

spacing means for the convolutions comprising heat conducting fins disposed parallel to the direction of motion of the air.

8. A tube coil having a support comprising a pair of clamping members between which the coil is adapted to be held, and a thermally conducting member between the clamping members, said conducting memberhaving recesses for holding the convoluto fluid currents comprising in combination a coil of tubing, a pair of clamping means for securing the convolutions of the coil in place, and spacing means between the clamping means and between said convolutions, said spacing means permitting unobstructed passage of fluid along the convolutions between the clamping means.

11. A coil to be subjected to fluid currents having a pair of clamping means for securing the convolutions of the coil in place, and spacing means between the convolutions comprising heat conducting means in thermal contact with the coil.

12. A coil adapted to be subjected to fluid currents having a pair of clamping means for securing the convolutions of the coil in place and spacing means between the signature.

FRANK W. ANDREWS. 

